Allow only capital and small letters

Question

I would like to accept only small and capital letters from the user.

I tried the below code, it echoes the invalid character message but doesn\'t work. I mean it doe

Answer 1

If you just want to check you could use ctype_alpha() but you said you want to ACCEPT only letters so if you choose to accept the input you could:

$fname=preg_replace('/[^a-z]/i','',$fname);

better after the check